EP0848571A2 - Tragbares Stereotonsystem - Google Patents

Tragbares Stereotonsystem Download PDF

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Publication number
EP0848571A2
EP0848571A2 EP97309621A EP97309621A EP0848571A2 EP 0848571 A2 EP0848571 A2 EP 0848571A2 EP 97309621 A EP97309621 A EP 97309621A EP 97309621 A EP97309621 A EP 97309621A EP 0848571 A2 EP0848571 A2 EP 0848571A2
Authority
EP
European Patent Office
Prior art keywords
tower
speaker
sound
amplifier
mixing console
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97309621A
Other languages
English (en)
French (fr)
Other versions
EP0848571A3 (de
EP0848571B1 (de
Inventor
Stephen J. Woolley
Peter Harries
Roger F. Cox
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fender Musical Instruments Corp
Original Assignee
Fender Musical Instruments Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fender Musical Instruments Corp filed Critical Fender Musical Instruments Corp
Publication of EP0848571A2 publication Critical patent/EP0848571A2/de
Publication of EP0848571A3 publication Critical patent/EP0848571A3/de
Application granted granted Critical
Publication of EP0848571B1 publication Critical patent/EP0848571B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/02—Spatial or constructional arrangements of loudspeakers

Definitions

  • the operational mode is of course of great importance, but the transportational mode has much more importance than is generally recognized by sound system manufacturers.
  • the ideal system would be one that is very satisfactory in both modes.
  • the performance sound system must be set up in such a way as to maximize the quality of sound generation and projection, and the convenience of operating the controls. And, the set-up must be done in accordance with the particular physical (environmental) conditions that happen to be present. Is the gig on a theater stage? In a gym? In an open-air location? These and other very different types of surroundings mean that the set-ups must be different in order to be optimal for the particular performance.
  • Hands-on mixers are conventionally in flat boxes that are mounted horizontally. There is a need for a very different type of hands-on mixer, one that can be mounted at any elevation and can be vertical not horizontal.
  • the sound system must be powerful--performance caliber as distinguished from something that might be used only in a living room or den of a home. But it is emphasized that "performance” denotes not only rock music gigs but also meetings or gatherings at any place whatever where public address systems are used. There are at least hundreds of different types of such places.
  • the sound system comprises two speakers mounted in inwardly-facing relationship on opposite sides of a hands-on mixing console-amplifier tower.
  • the controls of the tower face a speaker, thus are protected.
  • the entire assembly may be transported or stored relatively easily.
  • the speakers are removably secured on opposite sides of the tower in sealing relationship, so as to make the assembly water resistant.
  • each speaker is very easily assembled with (and disassembled from) one side of the mixer tower.
  • only one latch assembly, and related elements, is used on each side of the tower.
  • the assembled combination of speakers and tower is, in accordance with another aspect of the invention, sufficiently large and heavy to have much power and to generate much sound volume, but it is sufficiently light--and so shaped and sized--to be carried by a musician as a suitcase .
  • the preferred weight range of the assembled combination is 40-65 pounds (18-30Kg).
  • the preferred size of the assembled combination is about 30 inches (900mm) long by about 19 inches (500mm) high by about 12 inches (300mm) deep.
  • the mixer tower has laterally-projecting feet portions that aid and strengthen assembly of the tower with the speakers, that protect the tower and speakers from abrasion and bumps, and that aid in stabilizing the tower in its vertical orientation.
  • the speakers when assembled with the tower are held off the floor, and when disassembled therefrom can sit on the floor in highly stable three-point relationship.
  • tripod receptacles built into the lower portions of the speakers and tower, and that receive the telescoping vertical stems of portable speaker stands.
  • slip and plug elements that increase gently the shear resistance of each joint between tower and speaker. Therefore, and because a locking overcenter latch is provided, the assembled elements are resistant to coming apart when being slammed about while transported.
  • the tower has built into it a bin, chamber, or compartment used to transport and store microphones, cables and other components of the sound system.
  • said means to removably mount said speaker element or elements to said tower element comprises means to form sockets at the lower portion of said tower element, and means to form inserts at the lower portion of said speaker element, said inserts being adapted to be removably inserted into said sockets to hold said lower portions securely relative to each other.
  • the speaker element, tower element, inserts and sockets are so shaped and related that said inserts are inserted into said sockets when said speaker element and tower element are at a substantial angle to each other, following which said speaker element is pivoted relative to said tower element until said elements are not at a substantial angle to each other.
  • the means to removably mount preferably comprises a single latch to connect the upper portions of said tower element and speaker element.
  • the latch is an overcenter latch which includes locking means to prevent unintended unlatching.
  • the or each speaker comprises a molded synthetic resin body having an open side, in which a baffle plate having at least one opening therein is mounted in said open side, in which a loudspeaker element is mounted on said baffle plate over said opening therein, said open side and baffle plate and loudspeaker element form the sound-projecting side.
  • a sealing element is mounted around major portions of the periphery of said baffle plate, and the molded synthetic resin body has surface means against which said sealing element seats.
  • each speaker is identical to the other, so that illustrations of portions of one apply also to the same portions of the other.
  • each side of the mixing console-amplifier tower is identical to the opposite side thereof insofar as the mechanical elements are concerned; accordingly, the joints and strengthening elements and feet on both sides of the tower are identical.
  • the two latch mechanisms are identical to each other.
  • the illustrated performance sound system comprises a mixing console-amplifier 10 and two speakers 11,12.
  • Mixing console-amplifier 10 is shaped as a tower, being preferably vertically elongate.
  • element 10 is sometimes called a tower, or a mixer-tower, etc. It has front and back sides that are rectangular and are parallel to each other, the front side being shown at 13 in Fig. 2, and the back side being shown at 14 in Fig. 1.
  • Front side 13 has provided thereon the control panel 16 of a hands-on stereo mixing console-amplifier that is contained within the housing of unit 10.
  • the back side 14 has provided thereon, at its upper portion, a heat sink element 17 for radiating heat that is generated by the amplifier portion of the circuitry within mixer tower 10. Beneath the heat sink there is provided a door 18 (Figs. 1 and 4) to a compartment or bin that contains the microphones, cables and other small auxiliary elements of the sound system.
  • Each speaker 11,12 has a hollow body 20, the front side 21 of which is "open” except that it is covered by a grill or grid 22 to permit transmission of sound therethrough from loudspeaker elements contained within body 20.
  • the loudspeaker elements are mounted over openings in a baffle that is mounted over the open side, beneath the grill.
  • each speaker 11,12 at its peripheral region, is shaped and sized to fit together with (mate with) the peripheral region of either the front side 13 or the back side 14 of the mixing console-amplifier tower 10.
  • the relationships are such that, as described in detail below, the "open" front side 21 faces either the front side 13 or back side 14 of tower 10 when the elements 10-12 are secured together for transportation or storage.
  • the only things visible are the sides of the speaker bodies 20, the sides 23 of mixer tower 10, and handle and latching and foot elements described subsequently.
  • the hollow bodies 20 of the speakers 11,12, and the hollow body of the mixing console-amplifier 10, are molded strongly of synthetic resin. They afford a large degree of protection for the interior portions of these elements while not having excessive weight.
  • the speaker bodies (which have internal strengthening flanges) have the strength to not be tympanic.
  • a bottom plate 25 having forwardly and rearwardly projecting feet 26,27.
  • Such bottom plate 25 is formed of strong synthetic resin.
  • Plate 25 serves as a supporting and stabilizing element, as a protector against shocks and abrasion, as a strengthening element, as a means for keeping the mixer-tower 10 above the level of rainwater, and as a part of the connecting mechanism between the mixer-tower 10 and each speaker 11,12.
  • a bottom surface of plate 25 is substantially perpendicular to the longitudinal axis of mixer-tower 10 (Fig. 3), while the outer end surfaces are inclined (are beveled) upwardly and away from the mixer-tower 10. Because the feet 26,27 project outwardly substantial distances from the mixer-tower, they stabilize it (when it is resting on the floor as shown in Fig. 1)--despite the fact that the tower is vertically elongate and not thick (deep). The beveled ends of the feet minimize the chances that the assembly will become hung up on a stair or other obstruction when the assembly is in the transportational mode.
  • Insert strips 28 are secured in the outer portions of the feet so as to provide effective support for the assembly and for the separated mixer-tower, the lower portions of such strips extending downwardly as best shown in Fig. 6.
  • Such strips 28 are formed of abrasion-resistant synthetic resin.
  • sockets 30 formed in bottom plate 25 at regions adjacent back side 14 of the mixer-tower 10. There are corresponding elements on the other side of the tower, adjacent front side 13, because the connecting and joint portions of the apparatus are identical on each side of the tower and for each speaker (as stated in the early portion of this specification).
  • Each of the four sockets 30 (two adjacent back side 14 and two adjacent front side 13) has a vertical wall 31 (Figs. 4 and 6). These sockets are sufficiently deep and wide to receive strong insert elements next described.
  • each speaker 11,12 has, at its portion adjacent the front side 21 of the speaker, strong insert elements 34 that are respectively shaped and sized to fit snugly into sockets 30.
  • the insert elements 34 are extensions of a downwardly-extending rim portion 36 (wall 36) that encloses the majority of the bottom speaker wall except adjacent the front side 21 thereof.
  • the feet 26,27 are sufficiently narrow to fit within rim portion 36 (Fig. 5).
  • inner ends 38 of the inserts 34 fit adjacent opposite sides of a thick central region 39 of the foot, in straddling relationship. Such straddling cooperates with the below-described beads and other elements to maintain the parts firmly assembled.
  • Figs. 1-3 and 7-8 there is an over-center latch 42 provided at the center of each side of tower 10, at the top, and at the top-center of the front side 21 of each speaker.
  • the latches 42 are at opposite ends of a strong handle 43 that is built into tower 10, and is best shown in Fig. 3. It has clearance space 44 beneath it to receive the fingers of a person carrying the mixing console-amplifier tower 10 and the speakers 11,12 that are attached to it.
  • each latch 42 has a strong pull element 46 the hooked end 47 of which hooks over a strong cross pin 48 on a speaker.
  • the other end of pull element 46 connects (through triangular connectors) to a crank 49 that pivots about an angle bracket 51 which is strongly mounted on the tower.
  • a pivotally-mounted locking crank 52 fits--at its ends--beneath a lip 53 on bracket 51, to prevent accidental release of the latch until the musician intentionally pivots the locking crank clockwise as viewed in Fig. 8.
  • the periphery of the front side 13 and back side 14 of mixer-tower 10 is protuberant, and there is a groove or indentation around the periphery.
  • This groove is numbered 56.
  • a seal or gasket 57 provided around the periphery of the front side 21 of each speaker (Fig. 9).
  • Such gasket is adjacent a lip 58 that is provided around the periphery of speaker front side 21.
  • Lip 58 is shaped and sized to receive the protuberant front side or back side of the mixer-tower (Fig. 9). Stated otherwise, lip 58 fits into the above-indicated groove 56 (Fig. 9).
  • Plug 61 molded at the upper portion of each side of the tower, and which fits into a corresponding recess 62 during the last portions of the pivoting and latching operation of each speaker relative to the tower (Figs. 7 and 8).
  • Plug 61 is horizontally elongate (in a direction parallel to the mating faces) for increased strength.
  • the plug and recess cooperate with the described lip and groove, with the latch, with the other elements 30,37 and 34, to strengthen the joint between each speaker and the tower. Shock forces, including shear, are resisted.
  • the left side of that drawing shows the fully-assembled condition of a speaker with the tower.
  • the bottom side of such fully-assembled speaker is spaced above the floor (not shown) on which the bottom plate 25 and its inserts 28 sit.
  • the "bottom side" of each speaker includes the rim portion 36 (Fig. 4).
  • This cantilevered manner of hanging the speakers on the front side and back side of the tower 10 facilitates transportation and reduces wear, and helps keep the speakers out of puddles of water.
  • the support elements 68 on the outer regions of the bottom sides of speakers 11,12 cooperate with the bottom plate 25 and its inserts 28 during transportation. They absorb bumps from the numerous objects that are encountered.
  • FIG. 1 the bottom portions of speakers 11,12 are resting on a floor (not shown), in a three-point support.
  • One of the three points is the above-described support 68 (Figs. 3 and 4).
  • the remaining two points are feet or legs 69 which are mounted or molded on the speaker bottom, and extend downwardly adjacent and below insert elements 34, as best shown in Fig. 4.
  • Feet 69 are also formed of wear-resistant synthetic resin.
  • feet 69 and support 68 form a three-point support for the underside of each speaker when it is resting on the floor (Fig. 1).
  • the relationships are caused to be such that the face of each speaker then inclines somewhat from the vertical so as to project the sound somewhat upwardly.
  • each receptacle or socket 71 receives in strong relationship the upper end of the vertical shaft or stem 72 (Fig. 2) of a telescoping tripod apparatus (support stand) 73. With each shaft inserted into a socket, and adjusted to the desired height, the tripod apparatus 73 supports the speakers 11,12 and mixing console-amplifier tower 10 at the desired elevation above the floor.
  • Figs. 1 and Fig. 2 there may be a combination of the set-ups of Figs. 1 and Fig. 2.
  • the speakers 11,12 may be in the mounted condition shown in Fig. 2, but the tower 10 may be resting on the floor as shown in Fig. 1.
  • cables 76 extending between tower 10 and each speaker. As illustrated, the cable ends do not connect to the sides of elements 10,12, but instead to the faces thereof that mate with each other. Thus, the openings (sockets) for the cable ends are protected during shipment and storage of the sound system. In the best mode, sockets for the cable ends are located identically in each speaker.
  • the cables 76, microphones, etc. fit into the compartment 77 (Fig. 4) that is formed in tower 10 below the electronic and heat-sink elements thereof.
  • the door 18 pivots at the lower edge thereof about a horizontal axis and is closed by a latch 78 (Fig. 4).
  • FIG. 10 there is shown the configuration of the majority of control knobs 81 that are part of control panel 16 and that are rotatably mounted on the front side 13 of the mixing console-amplifier tower 10.
  • Each knob 81 has an opening or notch 82 to receive one finger of the operator of the mixer.
  • Each knob controls an aspect of the electronic circuitry contained within the tower.
  • FIGs. 11-16 all of these figures show the same embodiment, the second embodiment, which is the best mode known to applicants. Some of what is shown in Figs. 11-16 is the same as what is shown re the first embodiment (Figs. 1-10). All elements in Figs. 11-16 that correspond generally to what is shown in Figs. 1-10--but are not identical to what is there shown--are given tee same reference numerals but followed by the letter "a".
  • Fig. 11 shows inserts 34a having faces 37, these being sized and shaped to fit into sockets 30 (Fig. 4) adjacent socket walls 31. Inserts 34a connect with rim portions 36a, to create L-shaped configurations that are strong and rugged.
  • Inserts 34a/rims 36a are hollow, being open at the bottom in order to receive L-shaped strengthening fillers 100. Screws 101 secure the fillers 100 firmly in the cavities within elements 34a/36a.
  • the fillers 100 are integral with pad (foot) portions 102 that extend downwardly from the corner regions of elements 34a/36a. Pads 102 cooperate with support 68 in creating three-point supports for the speakers on the floor 103 (Fig. 12). Like support 68, pads 62 and the strengthening fillers integral therewith are formed of wear-resistant synthetic resin. The pads 102 are relatively impervious to damage caused by bumps, etc.
  • the upper central regions of mixing console-amplifier tower 10 and of each speaker 11-12 have registered grooves 105,106 that extend perpendicular to the mating faces (sides).
  • Groove 105 is formed in the tower body during its molding, and groove 106 is formed in each speaker body 20 during its molding. The grooves are aligned with handle 43.
  • Groove 105 has a vertical flange 107 at its outer end, that is integral with the tower wall and that provides vertical faces against which bracket 51 and seal 57a press. Groove 106 is closed at its outer end--except for a space the depth of which is equal to the thickness of pull element 46--by a strong T-section flange 108 that is integral with speaker body 20. Flange 108 has a thick lip 108b that extends away from the tower. It also has a thicker lip 108c that extends toward the tower, being adapted to engage flange 107 as shown in Fig. 14.
  • crank 52 cams itself (or is manually shifted) past lip 53 of bracket 51 (such crank 52 having an outer beveled face for this purpose).
  • the crank 52 is urged counterclockwise by a torsion spring 109 (Fig. 14) so that the lower end of the crank remains beneath lip 53 until the crank is intentionally manually pivoted clockwise by a person desiring to open the latch. Opening of the latch is completed by moving the parts back to the Figure 13 position, then lifting pull element 46 to disengage hooked end 47 from lip 108b.
  • Fig. 16 which complements Fig. 9, the "open" side of speaker 12 (and speaker 11), that is to say the open side of the molded body 20 of each speaker, is in part covered not only by grill 22 but by a molded synthetic resin baffle 111.
  • baffle has at least one, and normally several, circular openings therein over which loudspeaker elements are mounted in outwardly facing relationship.
  • One such opening is shown in part at 112, and one such loudspeaker element is shown in part at 113.
  • One of the mounting screws for the indicated loudspeaker element is shown at 114.
  • Fig. 16 shows the lip 58 that fits into groove or indentation 56 as described above relative to Fig. 9.
  • Such lip 58 and groove 56 extend vertically up the sides of the speakers and tower (Fig. 2), and also extend generally horizontally across the top except at the central region, such central region being shown in Figs. 13 and 14.
  • the seal or gasket 57a (Figs. 16 and 13-14) is mounted on the two vertical sides of baffle 111 and also extends continuously across the top of the baffle.
  • the illustrated means of mounting the seal on the baffle is a flange 116 on the baffle periphery, on which the seal is pressed (popped). From such flange 116, the seal 57a extends outwardly substantially past the face of baffle 111 (Figs. 16 and 13), so that it may be sealingly compressed by the tower 10 as the above-described latch mechanism closes to its Fig. 14 position. Stated more specifically, seal 57a is compressed by the tower body face portion that is adjacent groove 56 (Fig. 9), and is also compressed (at the top-center region) by the flange 107 (Fig. 14).
  • the described sealing compression of seal 57a occurs only when one (or both) speakers 10,11 is assembled with tower 10.
  • the baffle 111 Prior to that, the baffle 111, with its seal 57a mounted thereon, is inserted into the open side of speaker body 20. Screws 118 are then inserted through the baffle 111 at spaced points therearound, and are threaded into interior protuberances 119 that are molded integrally with body 20 at such spaced points, so as to firmly secure the baffle to the speaker body.
  • the grill 22 (which may for example be plastic or metal mesh, or cloth) is then mounted and covers the speakers and speaker openings, as well as covering the heads of screws 118 (Fig. 16).
  • the plug or strengthening element 61 fits snugly into a recess 62 which is formed in baffle 111. And, the periphery of the baffle is closely associated with speaker wall elements therearound. Accordingly, the plug 61 and the wall of recess 62, and the baffle 111 and the encompassing wall of the speaker, all fit together and cooperate with each other in resisting shock forces (and other forces) including shear, when the assembly is in its transportational mode.
  • the sound system tower 10 contains various electronic sound-system elements.
  • such electronic sound-system elements are combined as a hands-on mixing console and amplifier.
  • Such amplifier is a power amplifier.
  • the electronic sound-system elements are combined as a power amplifier (without any mixer).
  • the electronic sound-system elements are combined as a mixer, without the amplifier.
  • Such mixer is preferably a hands-on mixing console.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Stereophonic Arrangements (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
EP97309621A 1996-12-11 1997-11-28 Tragbares Stereotonsystem Expired - Lifetime EP0848571B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US76332796A 1996-12-11 1996-12-11
US763327 1996-12-11
US789652 1997-01-27
US08/789,652 US5933507A (en) 1996-12-11 1997-01-27 Highly portable stereo sound system comprising mixing console-amplifier and speakers

Publications (3)

Publication Number Publication Date
EP0848571A2 true EP0848571A2 (de) 1998-06-17
EP0848571A3 EP0848571A3 (de) 1999-06-09
EP0848571B1 EP0848571B1 (de) 2004-07-14

Family

ID=27117264

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97309621A Expired - Lifetime EP0848571B1 (de) 1996-12-11 1997-11-28 Tragbares Stereotonsystem

Country Status (3)

Country Link
US (1) US5933507A (de)
EP (1) EP0848571B1 (de)
DE (1) DE69729845T2 (de)

Families Citing this family (21)

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US20030095671A1 (en) * 2001-11-21 2003-05-22 Iag Limited Method and apparatus for transporting audio equipment
US7116795B2 (en) * 2003-02-06 2006-10-03 Michael P Tuason Self-aligning self-sealing high-fidelity portable speaker and system
US20050195997A1 (en) * 2004-03-08 2005-09-08 Sekaku Electron Industry Co., Ltd. Audio mixer
US7095867B2 (en) * 2004-04-30 2006-08-22 Altec Lansing Technologies, Inc. Portable audio reproduction system
US7469052B2 (en) * 2004-06-18 2008-12-23 Peavey Electronics Corporation Portable sound system, apparatus, and method
US8798305B2 (en) 2004-07-06 2014-08-05 Kaddan Entertainment, Inc. System and method for securing headphone transducers
US7399198B2 (en) * 2004-09-13 2008-07-15 Sharper Image Corp. Device with speaker and retractable cable unit
KR200371579Y1 (ko) * 2004-09-17 2005-01-14 주식회사 아침기술 엠피쓰리 플레이어용 삼발이형 스피커
JP4496904B2 (ja) * 2004-09-22 2010-07-07 ヤマハ株式会社 スピーカセット
US7602934B2 (en) * 2005-04-29 2009-10-13 Cerwin-Vega, Inc. Speaker system with built-in storage of satellite speakers
US20060291676A1 (en) * 2005-06-03 2006-12-28 Altec Lansing Technologies, Inc. Control panel door apparatus
US8929579B2 (en) 2010-10-11 2015-01-06 Harman International Industries, Incorporated Speaker and mixer assembly
JP5569540B2 (ja) * 2012-01-06 2014-08-13 ヤマハ株式会社 音響機器
US9648407B2 (en) 2014-06-12 2017-05-09 Kaddan Entertainment, Inc. System and method for managing headphone wires
USD739846S1 (en) * 2014-06-19 2015-09-29 Gregory Castellanos Portable sound system
US9986320B2 (en) 2014-11-25 2018-05-29 Kenneth Gustave ROEBKE Portable guitar amplifier
USD827608S1 (en) 2016-01-15 2018-09-04 Harman International Industries, Incorporated Public announcement system
USD841624S1 (en) 2017-05-25 2019-02-26 Bosch Security Systems, Inc. Loudspeaker including mountain bracket
USD847113S1 (en) 2017-05-25 2019-04-30 Bosch Security Systems, Inc. Loudspeaker
USD837766S1 (en) * 2017-05-25 2019-01-08 Bosch Security Systems, Inc. Loudspeaker including mounting bracket
WO2021144777A1 (en) 2020-01-16 2021-07-22 Zawada Lukasz Raisable or rotatable bed for console

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US3443031A (en) * 1965-11-19 1969-05-06 Lanier Electronics Lab Portable combination public-address system and lectern
US4380947A (en) * 1980-06-20 1983-04-26 Nippon Gakki Seizo Kabushiki Kaisha Portable electronic musical instrument having separable controlling panel and keyboard
US5090562A (en) * 1991-04-23 1992-02-25 Grullemans Winslow C Protective case for portable sound-playing device
FR2687269A1 (fr) * 1992-02-10 1993-08-13 Champeil Franck Ensemble de sonorisation.

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US2851526A (en) * 1954-07-27 1958-09-09 Richard E Maples Ventilated container
US3023274A (en) * 1958-11-26 1962-02-27 Henry W Shaw Portable lectern
US3370125A (en) * 1964-05-26 1968-02-20 Sound Craft Systems Inc Auxiliary loud-speaker system
US3684831A (en) * 1970-10-19 1972-08-15 Electronic Dev Corp Portable lecturn unit
US4052561A (en) * 1976-04-05 1977-10-04 Audiophonics Corporation Lectern with detent-hinged shelf for portable sound system
DE3139893A1 (de) * 1980-10-09 1982-07-08 Mitsubishi Denki K.K., Tokyo Tragbare akustische einrichtung
JPS6041396A (ja) * 1984-07-17 1985-03-05 Matsushita Electric Ind Co Ltd 音響装置
US4535870A (en) * 1984-11-15 1985-08-20 General Electric Company Quick attach-detach mechanism for audio components

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3443031A (en) * 1965-11-19 1969-05-06 Lanier Electronics Lab Portable combination public-address system and lectern
US4380947A (en) * 1980-06-20 1983-04-26 Nippon Gakki Seizo Kabushiki Kaisha Portable electronic musical instrument having separable controlling panel and keyboard
US5090562A (en) * 1991-04-23 1992-02-25 Grullemans Winslow C Protective case for portable sound-playing device
FR2687269A1 (fr) * 1992-02-10 1993-08-13 Champeil Franck Ensemble de sonorisation.

Also Published As

Publication number Publication date
US5933507A (en) 1999-08-03
EP0848571A3 (de) 1999-06-09
DE69729845D1 (de) 2004-08-19
DE69729845T2 (de) 2005-07-21
EP0848571B1 (de) 2004-07-14

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